OWNER'S MANUAL COMMAND 11-16 HP HORIZONTAL CRANKSHAFT 1 Safety Precautions To insure safe operations please read the following statements and understand their meaning. Also refer to your equipment owner's manual for other important safety information. This manual contains safety precautions which are explained below. Please read carefully. WARNING Warning is used to indicate the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the warning is ignored. CAUTION Caution is used to indicate the presence of a hazard that will or can cause minor personal injury or property damage if the caution is ignored. NOTE Note is used to notify people of installation, operation, or maintenance information that is important but not hazard-related. For Your Safety! These precautions should be followed at all times. Failure to follow these precautions could result in injury to yourself and others. WARNING WARNING Explosive Fuel can cause fires and severe burns. Rotating Parts can cause severe injury. Stop engine before filling fuel tank. Stay away while engine is in operation. Explosive Fuel! Gasoline is extremely flammable and its vapors can explode if ignited. Store gasoline only in approved containers, in well ventilated, unoccupied buildings, away from sparks or flames. Do not fill the fuel tank while the engine is hot or running, since spilled fuel could ignite if it comes in contact with hot parts or sparks from ignition. Do not start the engine near spilled fuel. Never use gasoline as a cleaning agent. Rotating Parts! Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate the engine with covers, shrouds, or guards removed. CAUTION Electrical Shock can cause injury. Do not touch wires while engine is running. Electrical Shock! Never touch electrical wires or components while the engine is running. They can be sources of electrical shock. 2 WARNING Hot Parts can cause severe burns. Do not touch engine while operating or just after stopping. Hot Parts! Engine components can get extremely hot from operation. To prevent severe burns, do not touch these areas while the engine is running, or immediately after it is turned off. Never operate the engine with heat shields or guards removed. California Proposition 65 Warning Engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Safety Precautions (Cont.) WARNING WARNING WARNING Accidental Starts can cause severe injury or death. Carbon Monoxide can cause severe nausea, fainting or death. Explosive Gas can cause fires and severe acid burns. Disconnect and ground spark plug lead before servicing. Do not operate engine in closed or confined area. Charge battery only in a well ventilated area. Keep sources of ignition away. Accidental Starts! Disabling engine. Accidental starting can cause severe injury or death. Before working on the engine or equipment, disable the engine as follows: 1) Disconnect the spark plug lead(s). 2) Disconnect negative (-) battery cable from battery. Lethal Exhaust Gases! Engine exhaust gases contain poisonous carbon monoxide. Carbon monoxide is odorless, colorless, and can cause death if inhaled. Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area. Explosive Gas! Batteries produce explosive hydrogen gas while being charged. To prevent a fire or explosion, charge batteries only in well ventilated areas. Keep sparks, open flames, and other sources of ignition away from the battery at all times. Keep batteries out of the reach of children. Remove all jewelry when servicing batteries. Before disconnecting the negative (-) ground cable, make sure all switches are OFF. If ON, a spark will occur at the ground cable terminal which could cause an explosion if hydrogen gas or gasoline vapors are present. Congratulations – You have selected a fine four-cycle, single cylinder, air-cooled engine. Kohler designs long life strength and on-the-job durability into each engine…making a Kohler engine dependable…dependability you can count on. Here are some reasons why: • Efficient overhead valve design and full pressure lubrication provide maximum power, torque, and reliability under all operating conditions. • Dependable, maintenance free electronic ignition ensures fast, easy starts time after time. • Kohler engines are easy to service. All routine service areas (like the dipstick and oil fill, oil filter, air cleaner, spark plug, and carburetor) are easily and quickly accessible. • Parts subject to the most wear and tear (like the cylinder liner and camshaft) are made from precision formulated cast iron. Because the cylinder liner can be rebored, these engines can last even longer. • Every Kohler engine is backed by a worldwide network of over 10,000 distributors and dealers. Service support is just a phone call away. Call 1-800-544-2444 (U.S. & Canada) for Sales & Service assistance. To keep your engine in top operating condition, follow the maintenance procedures in this manual. 3 Oil Fill/Dipstick Muffler Air Cleaner Fuel Tank Choke Lever Electric Starter Oil Drain Plug Oil Drain Plug Fuel Shut-Off Oil Sentry™ (Optional) Oil Filter Oil Drain Plug Throttle Lever Retractable Starter Figure 1. Typical Command Horizontal Shaft Engine. Oil Recommendations Using the proper type and weight of oil in the crankcase is extremely important. So is checking oil daily and changing oil regularly. Failure to use the correct oil, or using dirty oil, causes premature engine wear and failure. A logo or symbol on oil containers identifies the API service class and SAE viscosity grade. See Figure 3. Oil Type Use high quality detergent oil of API (American Petroleum Institute) service class SG, SH, SJ or higher. Select the viscosity based on the air temperature at the time of operation as shown in the following table. Figure 3. Oil Container Logo. ** * Refer to “Maintenance Instructions” beginning on page 8 for detailed oil check, oil change, and oil filter change procedures. Fuel Recommendations *Use of synthetic oil having 5W-20 or 5W-30 rating is acceptable, up to 40°F. **Synthetic oils will provide better starting in extreme cold (below -10°F). Figure 2. Viscosity Grades Table. NOTE: Using other than service class SG, SH, SJ or higher oil or extending oil change intervals longer than recommended can cause engine damage. 4 WARNING: Explosive Fuel! Gasoline is extremely flammable and its vapors can explode if ignited. Store gasoline only in approved containers, in well ventilated, unoccupied buildings, away from sparks or flames. Do not fill the fuel tank while the engine is hot or running, since spilled fuel could ignite if it comes in contact with hot parts or sparks from ignition. Do not start the engine near spilled fuel. Never use gasoline as a cleaning agent. General Recommendations Purchase gasoline in small quantities and store in clean, approved containers. A container with a capacity of 2 gallons or less with a pouring spout is recommended. Such a container is easier to handle and helps eliminate spillage during refueling. Do not use gasoline left over from the previous season, to minimize gum deposits in your fuel system and to insure easy starting. Do not add oil to the gasoline. Do not overfill the fuel tank. Leave room for the fuel to expand. Fuel Type For best results use only clean, fresh, unleaded gasoline with a pump sticker octane rating of 87 or higher. In countries using the Research method, it should be 90 octane minimum. Unleaded gasoline is recommended as it leaves less combustion chamber deposits. Leaded gasoline may be used in areas where unleaded is not available and exhaust emissions are not regulated. Be aware however, that the cylinder head will require more frequent service. Gasoline/Alcohol blends Gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline by volume) is approved as a fuel for Kohler engines. Other gasoline/alcohol blends are not approved. IMPORTANT ENGINE INFORMATION THIS ENGINE MEETS U.S. EPA 2004 AND CALIFORNIA 2006 AND LATER EMISSION CONTROL REGULATIONS FOR SI SORE* FAMILY DISPL. (CC) MODEL NO. SPEC. NO. SERIAL NO. EMISSION COMPLIANCE PERIOD: EPA: CARB: THIS ENGINE IS CERTIFIED TO OPERATE ON: REFER TO OWNER'S MANUAL FOR SAFETY, MAINTENANCE SPECS AND ADJUSTMENTS. FOR SALES/SERVICE IN US/CANADA, CALL: 1-800-544-2444 www.kohlerengines.com KOHLER CO. KOHLER, WISCONSIN USA *Small Off-Road Engines Figure 4. Engine Identification Label. The Emission Compliance Period referred to on the Emission Control or Air Index label indicates the number of operating hours for which the engine has been shown to meet Federal and CARB emission requirements. The following table provides the Engine Compliance Period (in hours) associated with the category descriptor found on the certification label. Emission Compliance Period (Hours) EPA Gasoline/Ether blends Methyl Tertiary Butyl Ether (MTBE) and unleaded gasoline blends (up to a maximum of 15% MTBE by volume) are approved as a fuel for Kohler engines. Other gasoline/ether blends are not approved. Engine Identification Numbers N11236 CARB Category C 250 Hours Moderate 125 Hours Category B 500 Hours Intermediate 250 Hours Category A 1000 Hours Extended 500 Hours Refer to certification label for engine displacement. Exhaust Emission Control System for models CH11,12.5,13,14,15,16 is EM. When ordering parts, or in any communication involving an engine, always give the Model, Specification, and Serial Numbers of the engine. The engine identification numbers appear on a decal affixed to the engine shrouding. Include letter suffixes, if there are any. Record your engine identification numbers on the identification label (Figure 4) for future reference. 5 Operating Instructions Also read the operating instructions of the equipment this engine powers. Pre-Start Checklist • Check oil level. Add oil if low. Do not overfill. • Check fuel level. Add fuel if low. • Check cooling air intake areas and external surfaces of engine. Make sure they are clean and unobstructed. • Check that the air cleaner components and all shrouds, equipment covers, and guards are in place and securely fastened. • Check that any clutches or transmissions are disengaged or placed in neutral. This is especially important on equipment with hydrostatic drive. The shift lever must be exactly in neutral to prevent resistance which could keep the engine from starting. WARNING: Lethal Exhaust Gases! Engine exhaust gases contain poisonous carbon monoxide. Carbon monoxide is odorless, colorless, and can cause death if inhaled. Avoid inhaling exhaust fumes, and never run the engine in a closed building or confined area. Cold Weather Starting Hints 1. Be sure to use the proper oil for the temperature expected. See Figure 2 on page 4. 2. Declutch all possible external loads. 3. A warm battery has much more starting capacity than a cold battery. 4. Use fresh winter grade fuel. NOTE: Winter grade gasoline has higher volatility to improve starting. Do not use gasoline left over from summer. Starting 1. For a Cold Engine – Place the throttle control midway between the “slow” and “fast” positions. Place the choke control into the “on” position. For a Warm Engine (normal operating temperatures) – Place the throttle/choke control midway between the “slow” and “fast” positions. Place the choke into the “on” position. See Figure 5. Choke Off — On Throttle Fast On Figure 5. Throttle and Choke Positions for Starting Engine. 2. Start the engine as follows: For a Retractable Start Engine – SLOWLY pull the starter handle until just past compression – STOP! Return starter handle, pull firmly with a smooth, steady motion to start. Pull the handle straight out to avoid excessive rope wear from the starter rope guide. Extend the starting rope periodically and check its condition. If the rope is frayed, have it replaced immediately by your Kohler Engine Service Dealer. WARNING: Accidental Starts! Before extending and checking the retractable starter rope, remove the spark plug lead to prevent the engine from starting accidentally. Make sure the equipment is in neutral. 6 For an Electric Start Engine – Activate the starter switch. Release the switch as soon as the engine starts. NOTE: Do not crank the engine continuously for more than 10 seconds at a time. If the engine does not start, allow a 60 second cool down period between starting attempts. Failure to follow these guidelines can burn out the starter motor. NOTE: Upon start-up, a metallic ticking may occur. This is caused by hydraulic lifter leakdown during storage. Run the engine for 5 minutes. The noise will normally cease in the first minute. If noise continues, run the engine at mid-throttle for 20 minutes. If noise persists, take the engine to your local Kohler Service outlet. NOTE: If the engine develops sufficient speed to disengage the starter but does not keep running (a false start), engine rotation must be allowed to come to a complete stop before attempting to restart the engine. If the starter is engaged while the flywheel is rotating, the starter pinion and flywheel ring gear may clash, resulting in damage to the starter. If the starter does not turn the engine over, shut off starter immediately. Do not make further attempts to start the engine until the condition is corrected. Do not jump start using another battery (refer to “Battery”). See your Kohler Engine Service Dealer for trouble analysis. 3. For a Cold Engine – Gradually return the choke control to the “off” position after the engine starts and warms ups. The engine/equipment may be operated during the warm up period, but it may be necessary to leave the choke partially on until the engine warms up. 4. For a Warm Engine – Return choke to “off” position as soon as engine starts. Stopping b. For engines equipped with a shutdown solenoid: Position the throttle control somewhere between half and full throttle; then stop the engine. Battery A 12 volt battery is normally used. Refer to the operating instructions of the equipment this engine powers for specific battery requirements. If the battery charge is not sufficient to crank the engine, recharge the battery (see page 12). Operating Angle of Operation This engine will operate continuously at angles up to 25°. Check oil level to assure crankcase oil level is at the “F” mark. Refer to the operating instructions of the equipment this engine powers. Because of equipment design or application, there may be more stringent restrictions regarding the angle of operation. NOTE: Do not operate this engine continuously at angles exceeding 25° in any direction. Engine damage could result from insufficient lubrication. Cooling NOTE: If debris builds up on the grass screen or other cooling air intake areas, stop the engine immediately and clean. Operating the engine with blocked or dirty air intake and cooling areas can cause extensive damage due to overheating. WARNING: Hot Parts! Engine components can get extremely hot from operation. To prevent severe burns, do not touch these areas while the engine is running–or immediately after it is turned off. Never operate the engine with heat shields or guards removed. Engine Speed NOTE: Do not tamper with the governor setting to increase the maximum engine speed. Overspeed is hazardous and will void the engine warranty. 1. Remove the load by disengaging all PTO attachments. 2a. For engines without a shutdown solenoid: Move the throttle to the ‘‘slow’’ or ‘‘low’’ idle position. Allow the engine to run at idle for 30-60 seconds; then stop the engine. 7 Maintenance Instructions Maintenance, repair, or replacement of the emission control devices and systems, which are being done at the customers expense, may be performed by any non-road engine repair establishment or individual. Warranty repairs must be performed by an authorized Kohler service outlet. WARNING: Accidental Starts! Disabling engine. Accidental starting can cause severe injury or death. Before working on the engine or equipment, disable the engine as follows: 1) Disconnect the spark plug lead(s). 2) Disconnect negative (-) battery cable from battery. Maintenance Schedule These required maintenance procedures should be performed at the frequency stated in the table. They should also be included as part of any seasonal tune-up. Frequency Daily or Before Starting Engine Every 25 Hours Every 50 Hours Every 100 Hours Every 200 Hours Annually or Every 500 Hours Maintenance Required • • • • • Fill fuel tank. Check oil level. Check air cleaner for dirty¹, loose, or damaged parts. Check air intake and cooling areas, clean as necessary¹. Service precleaner element¹. • • • • Check gear reduction unit. Replace air cleaner element¹. Change oil. Remove cooling shrouds and clean cooling areas¹. • • • • Change oil filter. Check spark plug condition and gap. Have bendix starter drive serviced². Have solenoid shift starter disassembled and cleaned2. ¹Perform these maintenance procedures more frequently under extremely dusty, dirty conditions. ²Have a Kohler Engine Service Dealer perform this service. Check Oil Level The importance of checking and maintaining the proper oil level in the crankcase cannot be overemphasized. Check oil BEFORE EACH USE as follows: 1. Make sure the engine is stopped, level, and is cool so the oil has had time to drain into the sump. 2. To keep dirt, grass clippings, etc., out of the engine, clean the area around the oil fill cap/ dipstick before removing it. 3. Remove the oil fill cap/dipstick; wipe oil off. Press-On Figure 6. Dipstick Styles. For engines with a press-on style dipstick: Reinsert the dipstick into the tube and press onto the tube. See Figure 6. For engines with a thread-on style dipstick: Reinsert the dipstick into the tube and rest the oil fill cap on the tube. Do not thread the cap onto the tube. See Figure 6. 8 Thread-On 4. Remove the dipstick and check the oil level. The oil level should be up to, but not over, the “F” mark on the dipstick. See Figure 7. “F” Mark Operating Range Figure 7. Oil Level Dipstick. 5. If the level is low, add oil of the proper type, up to the “F” mark on the dipstick. (Refer to “Oil Type” on page 4.) Always check the level with the dipstick before adding more oil. NOTE: To prevent extensive engine wear or damage, always maintain the proper oil level in the crankcase. Never operate the engine with the oil level below the “L” mark or over the “F” mark on the dipstick. Change the oil as follows (see Figure 8): 1. To keep dirt, grass clippings, etc., out of the engine, clean the area around the oil fill cap/ disptick before removing it. 2. Remove the oil drain plug and oil fill cap/dipstick. Be sure to allow ample time for complete drainage. 3. Reinstall the drain plug. Make sure it is tightened to 13.6 N·m (10 ft. lb.) torque. 4. Fill the crankcase, with new oil, of the proper type, to the “F” mark on the dipstick. Refer to “Oil Type” on page 4. Always check the level with the dipstick before adding more oil. 5. Reinstall the oil fill cap or plug and tighten securely. NOTE: To prevent extensive engine wear or damage, always maintain the proper oil level in the crankcase. Never operate the engine with the oil level below the “L” mark or over the “F” mark on the dipstick. Oil Sentry™ Some engines are equipped with an optional Oil Sentry™ oil pressure switch. If the oil pressure decreases below an acceptable level, the Oil Sentry™ will either shut off the engine or activate a warning signal, depending on the application. NOTE: Make sure the oil level is checked BEFORE EACH USE and is maintained up to the “F” mark on the dipstick. This includes engines equipped with Oil Sentry™. Change Oil and Oil Filter Oil Sentry™ (Optional) Oil Filter Figure 8. Oil Filter and Optional Oil Sentry™ Switch. Change Oil Change oil after every 100 hours of operation. Refill with service class SG, SH, SJ or higher oil as specified in the “Viscosity Grades” table (Figure 2) on page 4. Change the oil while the engine is still warm. The oil will flow more freely and carry away more impurities. Make sure the engine is level when filling, checking, or changing the oil. 9 Change Oil Filter Replace the oil filter at least every other oil change (every 200 hours of operation). Always use a genuine Kohler oil filter, Part No. 52 050 02-S. Air Cleaner Cover Replace the oil filter as follows: 1. Drain the oil from the engine crankcase. 2. Allow the oil filter to drain. 3. Before removing the oil filter, clean the area around the oil filter to keep dirt and debris out of the engine. Remove the old filter. Wipe off the surface where the oil filter mounts. 4. Place a new replacement filter in a shallow pan with the open end up. Pour new oil of the proper type in through the threaded center hole. Stop pouring when the oil reaches the bottom of the threads. Allow a minute or two for the oil to be absorbed by the filter material. Knob Figure 9. Air Cleaner Housing Components. Air Cleaner Base Element Cover Nut Paper Element 5. Put a drop of oil on your fingertip and wipe it on the rubber gasket. 6. Install the replacement oil filter to the filter adapter. Turn the oil filter clockwise until the rubber gasket contacts the filter adapter, then tighten the filter an additional 2/3 to 1 turn. 7. Reinstall the drain plug. 8. Fill the crankcase with new oil of the proper type to the ‘‘F’’ mark on the dipstick. 9. Start the engine and check for oil leaks. Correct any leaks before placing the engine into service. Check oil level to be sure it is up to but not over the “F” mark. Service Precleaner and Air Cleaner Element This engine is equipped with a replaceable, high density paper air cleaner element. Most engines are also equipped with an oiled, foam precleaner which surrounds the paper element. See Figures 9 and 10. Element Cover Foam Precleaner Figure 10. Air Cleaner Elements. Check the air cleaner daily or before starting the engine. Check for a buildup of dirt and debris around the air cleaner system. Keep this area clean. Also check for loose or damaged components. Replace all bent or damaged air cleaner components. NOTE: Operating the engine with loose or damaged air cleaner components could allow unfiltered air into the engine causing premature wear and failure. Service Precleaner Wash and reoil the precleaner every 25 hours of operation, (more often under extremely dusty or dirty conditions). 1. Loosen the air cleaner cover knob and remove the cover. 2. Remove the precleaner from the paper element. 3. Wash the precleaner in warm water with detergent. Rinse the precleaner thoroughly until all traces of detergent are eliminated. Squeeze out excess water (do not wring). Allow precleaner to air dry. 10 4. Saturate the precleaner with new engine oil. Squeeze out all excess oil. 5. Reinstall the precleaner over the paper element. 6. Reinstall the air cleaner cover and tighten the knob securely. 7. When precleaner replacement is necessary order Part No. 52 083 01-S. Service Paper Element Every 100 hours of operation (more often under extremely dusty or dirty conditions), replace the paper element. 1. Loosen the air cleaner cover knob and remove the cover. Remove the wing nut and then remove the air cleaner element with precleaner. Remove the precleaner from the element and service as necessary. 2. Do not wash the paper element or use pressurized air, as this will damage the element. Replace a dirty, bent, or damaged element with a genuine Kohler element. Handle new elements carefully; do not use if the sealing surfaces are bent or damaged. 3. When servicing the air cleaner, check the air cleaner base. Make sure it is secured and not bent or damaged. Also check the element cover for damage or improper fit. Replace all damaged air cleaner components. 4. Reinstall all components as described above. 5. When air cleaner element replacement is necessary order Part No. 47 083 01-S. Ignition System This engine is equipped with a dependable electronic magneto ignition system. Other than periodically checking/replacing the spark plug, no maintenance, timing, or adjustments are necessary or possible with this system. In the event starting problems should occur which are not corrected by replacing the spark plugs, see your Kohler Engine Service Dealer for trouble analysis. Check Spark Plug Every 200 hours of operation, remove the spark plug, check its condition, and reset the gap or replace with a new plug as necessary. The standard spark plug is a Champion® RC12YC (Kohler Part No. 12 132 02-S). A high-performance spark plug, Champion® Premium Gold 2071 (used on Pro Series engines, Kohler Part No. 12 132 06-S), is also available. Equivalent alternate brand plugs can also be used. 1. Before removing the spark plug, clean the area around the base of the plug to keep dirt and debris out of the engine. 2. Remove the plug and check its condition. Replace the plug if worn or reuse is questionable. NOTE: Do not clean the spark plug in a machine using abrasive grit. Some grit could remain in the spark plug and enter the engine causing extensive wear and damage. 3. Check the gap using a wire feeler gauge. Adjust the gap by carefully bending the ground electrode. See Figure 11. Gap CH11-15 plugs to 1.02 mm (0.040 in.). Gap CH16 plugs to 0.76 mm (0.030 in.) Wire Gauge Clean Air Intake/Cooling Areas To ensure proper cooling, make sure the grass screen, cooling fins, and other external surfaces of the engine are kept clean at all times. Spark Plug Every 100 hours of operation (more often under extremely dusty, dirty conditions), remove the blower housing and other cooling shrouds. Clean the cooling fins and external surfaces as necessary. Make sure the cooling shrouds are reinstalled. NOTE: Operating the engine with a blocked grass screen, dirty or plugged cooling fins, and/or cooling shrouds removed, will cause engine damage due to overheating. Ground Electrode Gap Figure 11. Servicing Spark Plug. 11 4. Reinstall the spark plug into the cylinder head. Torque the spark plug to 38.0-43.4 N·m (28-32 ft. lb.). Battery Charging WARNING: Explosive Gas! Batteries produce explosive hydrogen gas while being charged. To prevent a fire or explosion, charge batteries only in well ventilated areas. Keep sparks, open flames, and other sources of ignition away from the battery at all times. Keep batteries out of the reach of children. Remove all jewelry when servicing batteries. Before disconnecting the negative (-) ground cable, make sure all switches are OFF. If ON, a spark will occur at the ground cable terminal which could cause an explosion if hydrogen gas or gasoline vapors are present. fuel can only be adjusted within the limits allowed by the cap. Nikki carburetors have a sealed idle fuel adjusting needle which is not adjustable. Walbro Low Idle Speed Adj. Screw Low Idle Fuel Adj. Needle Nikki Low Idle Speed Adj. Screw Fuel Filter Some engines are equipped with an in-line fuel filter. Periodically inspect the filter and replace when dirty. Use a genuine Kohler filter. Reduction Gear Units On engines equipped with a reduction gear unit, remove the oil plug on lower part of cover every 50 hours of operation to check oil level. With the engine level, the oil level of the unit should be up to the bottom of the oil plug hole. To add oil, remove the vented plug at the top of the unit. Use AGMA No. 7 EP oil in the reduction gear unit. Following are a few products that meet this spec: Mobilgear 634 Pennzoil Super Maxol ‘‘S’’ Pennzoil Maxol EP Gear Oil Pennzoil Super Maxol EP Gear Oil Pennzoil Super Pennztac EP Gear Oil Carburetor Troubleshooting and Adjustments NOTE: Carburetor adjustments should be made only after the engine has warmed up. These engines are equipped with one of two basic types of fixed jet carburetors – Walbro or Nikki. The carburetor is designed to deliver the correct fuel-to-air mixture to the engine under all operating conditions. On both types of carburetors, the fixed main jet is calibrated at the factory and is not adjustable. On Walbro carburetors, the low idle fuel adjusting needle is set at the factory and normally does not need adjustment. Certified engines may have a fixed idle or limiter cap on the idle fuel adjusting needle. The idle 12 Figure 12. Carburetors. NOTE: To ensure correct engine operation at altitudes above 1525 meters (5000 ft.), it may be necessary to have an authorized Kohler dealer install a special high-altitude jet kit in the carburetor. If a high-altitude kit has been installed, the engine must be reconverted to the original jet size, before it is operated at lower altitudes, or overheating and engine damage can result. Troubleshooting If engine troubles are experienced that appear to be fuel system related, check the following areas before adjusting the carburetor. • Make sure the fuel tank is filled with clean, fresh gasoline. • Make sure the fuel tank cap vent is not blocked and that it is operating properly. • If the fuel tank is equipped with a shut-off valve, make sure it is open. • If the engine is equipped with an in-line fuel filter, make sure it is clean and unobstructed. Replace the filter if necessary. Set the adjusting needle midway between the rich and lean settings. See Figure 13. • Make sure fuel is reaching the carburetor. This includes checking the fuel lines and fuel pump for restrictions or faulty components, replace as necessary. Lean Adjust to Midpoint • Make sure the air cleaner element is clean and all air cleaner components are fastened securely. If, after checking the items listed above, the engine is hard to start, runs roughly, or stalls at low idle speed, it may be necessary to adjust or service the carburetor. Rich Carburetor Adjustment Figure 13. Optimum Low Idle Fuel Setting. NOTE: Certified engines may have a fixed idle or limiter cap on the idle fuel adjusting needle. Step 2 can only be performed within the limits allowed by the cap. 3. Low Idle Speed Setting: Place the throttle control into the “idle” or “slow” position. Set the low idle speed to 1200 RPM* (± 75 RPM) by turning the low idle speed adjusting screw in or out. Check the speed using a tachometer. 1. Start the engine and run at half throttle for 5 to 10 minutes to warm up. The engine must be warm before doing steps 2 and 3. *NOTE: The actual low idle speed depends on the application – refer to equipment manufacturer’s recommendations. The recommended low idle speed for basic engines is 1200 RPM. To ensure best results when setting the low idle fuel needle, the low idle speed must not exceed 1200 RPM (± 75 RPM). 2. Low Idle Fuel Needle Setting: Place the throttle into the “idle” or “slow” position. Turn the low idle fuel adjusting needle out (counterclockwise) from the preliminary setting until engine speed decreases (rich). Note the position of the needle. Now turn the adjusting needle in (clockwise). The engine speed may increase, then it will decrease as the needle is turned in (lean). Note the position of the needle. Troubleshooting When troubles occur, be sure to check the simple causes which, at first, may seem to obvious to be considered. For example, a starting problem could be caused by an empty fuel tank. Some common causes of engine troubles are listed in the following table. Do not attempt to service or replace major engine components, or any items that require special timing or adjustment procedures. Have your Kohler Engine Service Dealer do this work. Possible Cause No Problem Fuel Will Not Start • Hard Starting Stops Suddenly • Lacks Power Operates Erratically Knocks or Pings Skips or Misfires Backfires Overheats High Fuel Consumption Improper Fuel • • • • • • Dirt In Dirty Fuel Line Grass Screen • • • • • • • • • • • • • • Incorrect Oil Level Engine Overloaded Dirty Air Cleaner Faulty Spark Plug • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 13 Storage Parts Ordering If the engine will be out of service for two months or more, use the following storage procedure: The engine Model, Specification, and Serial Numbers are required when ordering replacement parts from your Kohler Engine Service Dealer. These numbers are found on the identification plate which is affixed to the engine shrouding. Include letter suffixes if there are any. See “Engine Identification Numbers” on page 5. 1. Clean the exterior surfaces of the engine. 2. Change the oil and filter while the engine is still warm from operation. See “Change Oil and Oil Filter” on page 9. 3. The fuel system must be completely emptied, or the gasoline must be treated with a stabilizer to prevent deterioration. If you choose to use a stabilizer, follow the manufacturers recommendations, and add the correct amount for the capacity of the fuel system. Fill the fuel tank with clean, fresh gasoline. Run the engine for 2-3 minutes to get stabilized fuel into the carburetor. To empty the system, run the engine until the fuel tank and system are empty. 4. Remove the spark plug. Add one tablespoon of engine oil into the spark plug hole. Install the plug, but do not connect the plug lead. Crank the engine two or three revolutions. 5. Remove the spark plug. Cover the spark plug hole with your thumb, and turn the engine over until the piston is at the top of its stroke. (Pressure against thumb is greatest.) Reinstall the plug, but do not connect the plug lead. 6. Store the engine in a clean, dry place. Always insist on genuine Kohler parts. All genuine Kohler parts meet strict standards for fit, reliability, and performance. Major Repair Major repair information is available in Kohler Engine Service Manuals. However, major repair generally requires the attention of a trained mechanic and the use of special tools and equipment. Your Kohler Engine Service Dealer has the facilities, training, and genuine Kohler replacement parts necessary to perform this service. For Sales & Service assistance call 1-800-544-2444 (U.S. & Canada) or contact your Kohler Engine Dealer or Service Distributor, they're in the Yellow Pages under Engines-Gasoline. Model Designation Model CH15ST for example: C designates Command engine, H designates horizontal crankshaft, and 15 designates horsepower. A letter suffix designates a specific version as follows: Suffix S T ST GT GS PT RT Designates Electric Start Retractable Start Electric/Retractable Start Generator Application/Retractable Start Generator Application/Electric Start Pump/Retractable Start Gear Reduction/Retractable Start Specifications Model: ................................................... CH11 .............. CH12.5 ........... CH13 ............... CH14 .............. CH15/CH16** Bore: .................................. mm (in.) ... 87 (3.43) ......... 87 (3.43) ......... 87 (3.43) ......... 87 (3.43) ......... 90 (3.55)/90 (3.55) Stroke: ................................ mm (in.) ... 67 (2.64) ......... 67 (2.64) ......... 67 (2.64) ......... 67 (2.64) ......... 67 (2.64)/67 (2.64) Displacement: .................... cm3 (in3) ... 398 (24.3) ....... 398 (24.3) ....... 398 (24.3) ....... 398 (24.3) ....... 426 (26.0)/426 (26.0) Power (@3600 RPM): ....... kW (HP) ... 8.2 (11*) .......... 9.33 (12.5*) ..... 9.75 (13*) ........ 10.50 (14*) ..... 11.2 (15*)/11.9 (16*) Max. Torque (@ RPM): ............ ft. lb. ... 20.2 @2000 ... 20.5 @2500 .... 20.5 @2500 .... 21.3 @2500 ... 24.5 @2400/25 @2400 Compression Ratio: .............................. 8.5:1 ............... 8.5:1 ................ 8.5:1 ................ 8.5:1 ............... 8.5:1/8.5:1 Weight: ................................. kg (lb.) ... 40 (88.3) ......... 40 (88.3) ......... 40 (88.3) ......... 40 (88.3) ......... 40 (88.3)/40 (88.3) Oil Capacity (w/filter): .... L (U.S. pt.) ... 1.9 (4) ............. 1.9 (4) ............. 1.9 (4) .............. 1.9 (4) ............. 1.9 (4)/1.9 (4) Lubrication: ........................................... Full Pressure w/full Flow Filter Exhaust Emission Control System for CH11,12.5,13,14,15,16 is EM. *Horsepower ratings are established in accordance with Society of Automotive Engineers – Small Engine Test Code – J1995 GROSS. Kohler Co. reserves the right to change product specifications, design, and standard equipment without notice and without incurring obligation. **CH16 engine is equipped with Smart Spark™ computerized ignition system. 14 LIMITED 2 YEAR COMMAND ENGINE WARRANTY We warrant to the original consumer that each new COMMAND engine sold by us will be free from manufacturing defects in materials or workmanship in normal service for a period of two (2) years from date of purchase, provided it is operated and maintained in accordance with Kohler Co.’s instructions and manuals. Our obligation under this warranty is expressly limited, at our option, to the replacement or repair at Kohler Co., Kohler, Wisconsin 53044, or at a service facility designated by us of such parts as inspection shall disclose to have been defective. EXCLUSIONS: Mufflers on engines used commercially (non-residential) are warranted for one (1) year from date of purchase, except catalytic mufflers, which are warranted for two (2) years. This warranty does not apply to defects caused by casualty or unreasonable use, including faulty repairs by others and failure to provide reasonable and necessary maintenance. The following items are not covered by this warranty: Engine accessories such as fuel tanks, clutches, transmissions, power-drive assemblies, and batteries, unless supplied or installed by Kohler Co. These are subject to the warranties, if any, of their manufacturers. WE SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY KIND, including but not limited to labor costs or transportation charges in connection with the repair or replacement of defective parts. ANY IMPLIED OR STATUARY WARRANTIES, INCLUDING WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY LIMITED TO THE DURATION OF THIS WRITTEN WARRANTY. We make no other express warranty, nor is any one authorized to make any in our behalf. Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. TO OBTAIN WARRANTY SERVICE: Purchaser must bring the engine to an authorized Kohler service facility. For the facility nearest you, consult your Yellow Pages or write Kohler Co., Attn: Engine Warranty Service Dept., Kohler, Wisconsin, 53044. ENGINE DIVISION, KOHLER CO., KOHLER, WISCONSIN 53044 KOHLER CO. FEDERAL AND CALIFORNIA EMISSION CONTROL SYSTEMS LIMITED WARRANTY SMALL OFF-ROAD ENGINES The U.S. Environmental Protection Agency (EPA), the California Air Resources Board (CARB), and Kohler Co. are pleased to explain the Federal and California Emission Control Systems Warranty on your small off-road equipment engine (herein engine). For California, engines produced in 1995 and later must be designed, built and equipped to meet the state’s stringent anti-smog standards. In other states, 1997 and later model year engines must be designed, built and equipped, to meet the U.S. EPA regulations for small non-road engines. The engine must be free from defects in materials and workmanship which cause it to fail to conform with U.S. EPA standards for the first two years of engine use from the date of sale to the ultimate purchaser. Kohler Co. must warrant the emission control system on the engine for the period of time listed above, provided there has been no abuse, neglect or improper maintenance. The emission control system may include parts such as the carburetor or fuel injection system, the ignition system, and catalytic converter. Also included are the hoses, belts and connectors and other emission related assemblies. Where a warrantable condition exists, Kohler Co. will repair the engine at no cost, including diagnosis (if the diagnostic work is performed at an authorized dealer), parts and labor. MANUFACTURER’S WARRANTY COVERAGE Engines produced in 1995 or later are warranted for two years in California. In other states, 1997 and later model year engines are warranted for two years. If any emission related part on the engine is defective, the part will be repaired or replaced by Kohler Co. free of charge. OWNER’S WARRANTY RESPONSIBILITIES (a) The engine owner is responsible for the performance of the required maintenance listed in the owner’s manual. Kohler Co. recommends that you retain all receipts covering maintenance on the engine, But Kohler Co. cannot deny warranty solely for the lack of receipts or for your failure to assure that all scheduled maintenance was performed. (b) Be aware, however, that Kohler Co. may deny warranty coverage if the engine or a part has failed due to abuse, neglect, improper maintenance or unapproved modifications. Continued on next page. 15 (c) For warranty repairs, the engine must be presented to a Kohler Co. service center as soon as a problem exists. Call 1-800-544-2444, or access our web site at: www.kohlerengines.com for the names of the nearest service centers. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days. If you have any questions regarding warranty rights and responsibilities, you should contact Kohler Co. at 1-920-457-4441 and ask for an Engine Service representative. COVERAGE Kohler Co. warrants to the ultimate purchaser and each subsequent purchaser that the engine will be designed, built and equipped, at the time of sale, to meet all applicable regulations. Kohler Co. also warrants to the initial purchaser and each subsequent purchaser, that the engine is free from defects in materials and workmanship which cause the engine to fail to conform with applicable regulations for a period of two years. Engines produced in 1995 or later are warranted for two years in California. For 1997 and later model years, EPA requires manufacturers to warrant engines for two years in all other states. These warranty periods will begin on the date the engine is purchased by the initial purchaser. If any emission related part on the engine is defective, the part will be replaced by Kohler Co. at no cost to the owner. Kohler Co. is liable for damages to other engine components caused by the failure of a warranted part still under warranty. Kohler Co. shall remedy warranty defects at any authorized Kohler Co. engine dealer or warranty station. Warranty repair work done at an authorized dealer or warranty station shall be free of charge to the owner if such work determines that a warranted part is defective. Listed below are the parts covered by the Federal and California Emission Control Systems Warranty. Some parts listed below may require scheduled maintenance and are warranted up to the first scheduled replacement point for that part. The warranted parts are: • • • • • • • • • • • • • Oxygen sensor (if equipped) Intake manifold (if equipped) Exhaust manifold (if equipped) Catalytic muffler (if equipped) Fuel metering valve (if equipped) Spark advance module (if equipped) Crankcase breather Ignition module(s) with high tension lead Gaseous fuel regulator (if equipped) Electronic control unit (if equipped) Carburetor or fuel injection system Fuel lines (if equipped) Air filter, fuel filter, and spark plugs (only to first scheduled replacement point) LIMITATIONS This Emission Control Systems Warranty shall not cover any of the following: (a) repair or replacement required because of misuse or neglect, improper maintenance, repairs improperly performed or replacements not conforming to Kohler Co. specifications that adversely affect performance and/or durability and alterations or modifications not recommended or approved in writing by Kohler Co., (b) replacement of parts and other services and adjustments necessary for required maintenance at and after the first scheduled replacement point, (c) consequential damages such as loss of time, inconvenience, loss of use of the engine or equipment, etc., (d) diagnosis and inspection fees that do not result in eligible warranty service being performed, and (e) any add-on or modified part, or malfunction of authorized parts due to the use of add-on or modified parts. MAINTENANCE AND REPAIR REQUIREMENTS The owner is responsible for the proper use and maintenance of the engine. Kohler Co. recommends that all receipts and records covering the performance of regular maintenance be retained in case questions arise. If the engine is resold during the warranty period, the maintenance records should be transferred to each subsequent owner. Kohler Co. reserves the right to deny warranty coverage if the engine has not been properly maintained; however, Kohler Co. may not deny warranty repairs solely because of the lack of repair maintenance or failure to keep maintenance records. Normal maintenance, replacement or repair of emission control devices and systems may be performed by any repair establishment or individual; however, warranty repairs must be performed by a Kohler authorized service center. Any replacement part or service that is equivalent in performance and durability may be used in non-warranty maintenance or repairs, and shall not reduce the warranty obligations of the engine manufacturer. FOR SALES AND SERVICE INFORMATION IN U.S. AND CANADA, CALL 1-800-544-2444 ENGINE DIVISION, KOHLER CO., KOHLER, WISCONSIN 53044 FORM NO.: TP-2473-E ISSUED: 12/94 REVISED: 12/01 MAILED: LITHO IN U.S.A.
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